Pioneer PD-S601 Service Manual page 19

PD-S601
Function in test mode Explanation
Carriage reverse
(inwards)
Carriage forward
(outwards)
OPEN/CLOSE | Disc tray open/close
30
Moves the pickup position toward the inner diameter of
the disc. When this key is pressed with the tracking
servo in a closed loop, the tracking servo automatically
goes into an open loop. Since the motor does not auto-
matically stop at the mechanical end point in test mode,
be careful with this operation.
Moves the pickup position toward the outer diameter of
the disc. When this key is pressed with the tracking
servo in a closed loop, the tracking servo automatically
goes into an open loop. Since the motor does not auto-
matically stop at the mechanical end point in test mode,
be careful with this operation.
Switches off all the servos and initialized.
The pickup remains where it was when this key was
pressed.
Open/close the disc tray. This key is a toggle key and
open/close tray altenately.
Pressing this key when the disc is turning stops the disc,
then opens the tray.
This key operation does not affect the position of the
pickup.
PD-S601
[How to play back a disc in test mode]
In test mode, since the servos operate independently, playing back a disc requires that you operate the keys in the
correct order to close the servos.
Here is the key operation sequence for playing back a disc in test mode.
PGM Lights up the laser diode and closes the focus servo.
g
PLAY D> Starts the spindle motor and closes the spindle servo.
g
PAUSE Closes the tracking servo.
Wait at least 2-3 seconds between each of these operations.
1. Focus Offset Adjustment
© Objective Sets the DC offset for the focus error amp.
@ Symptom when out of | The model does not focus in and the RF signal is dirty.
adjustment
@Measurement instru- | Connect the oscilloscope to @ Player state Test mode, stopped
ment connections: TP1, Pin 6(FCS. ERR) (just the Power switch on)
[Procedure}
Adjust VR103 (FCS. OFS) so that the DC voltage at TP1, Pin 6 (FCS. ERR) is —15050 mV.